Barber-chair.



A. L. UNDELAND.

BARBER GHAIR.

APPLICATION FILED MAY 27, 1908.

Patented July-11, 1911.

4 SHEETS-SHEET i.

Mania;

FOLUMB/I'A I'LANoaRAPn 60., WASHINGTON. n. c.

A. L. UNDELAND.

BARBER CHAIR.

APPLICATION TILED MAY 27, 1908.

Patented July 11, 1911 4 SHEETS-SHEET 2.

jmerazzprx J/YdrGCI/Z. a mm id COLUMBIA PLANuGRAPn c0.. WASHINGTON. n.c.

A. L. UNDELAND.

BARBER CHAIR.

APPLICATION IILED MAY 27, 1906.

997,937, Patented July 11,1911.

4 SHEETSSHBET 3.

wzltnessea' K Mrew ndelarzaz GOLUM IA FLANOGRAPH $20., WASHINGTON. B. c.

A. L. UNDELAND.

BARBER CHAIR.

APPLICATION FILED MAY 27, 1908.

997,987. Patented July 11,1911.

4 SHEETS-SHEET 4.

ANDREW L. UNIDELAND, OF OMAHA, NEBRASKA.

BARBER-CHAIR.

"Specification of Letters Patent.

Application filed May 27, 1908. Serial No. 435,199.

To all whom it may concern:

Be it known that I, ANDREW L. UNDELAND, a citizen of the United States,residing at Omaha, in the county of Douglas and State of Nebraska, haveinvented a certain new and useful Improvement in Barber-Chairs, of whichthe following is a full, clear, con cise, and exact description.

My invention relates to chairs and more particularly to chairs of therevolving and reclining type, such as are used by barbers and dentists,in which the seat is adjustable vertically by hydraulic pressure.

My invention has for its object the provision of means whereby the chairseat may be rapidly and easily raised or lowered, may be made eitherrevoluble or non-revoluble, and may be readily adjusted to differentreclining posit-ions, all by the manipulation of a single controllinglever.

My invention contemplates a cylinder in which a hollow pistonreciprocates, said piston being provided with double acting pump-pistonsarranged to control the flow of a fluid from the piston into thecylinder or vice versa, and thus either raise or lower the piston andthe chair seat carried upon the upper end thereof. The pump-pistions areconnected to a crank arm which is operated from a handle. The crank armhas also connected with it means for controlling the revolving of thepiston in the cylinder and additional means for controlling thereclining adjustment of the chair seat. Thus by the manipulation of asingle crank, the chair may be raised, held in a raised position,lowered, made revolving or non-revolving, and adjusted to differentreclining positions.

The several features of my invention may be more readily understood byreference to the accompanying drawings, in which- Figure 1 is a sideelevation of a chair embodying my invention, the dotted lines indicatingone of the reclining positions to which the chair may be adjusted; Fig.2 is a vertical central section through cylinder and piston, showing thepiston in its lowermost position, prepared to receive the oil or othercharging fluid; Fig. 3 is a view similar to that of Fig. 2 taken atright angles thereto, and showing by dotted lines the fluid in thehollow piston and cylinder; Fig. 4 is a plan sectional view on the line1 of Fig. 3; Fig. 5 is a side elevation of the hollow piston partly insection, showing the locking means for controlling the recliningposition of the chair; Fig. 6 is a plan view of the hollow piston; Fig.7 is a detail longitudinal section of the pump-piston; Fig. 8 is avertical central section, similar to that of Fig. 2, but showing thehollow piston held in its raised position; Fig. 9 and Fig. 10 areperspective views of the two valves controlling the ports in the head ofthe hollow piston.

Like parts are designated by similar characters of reference throughoutthe different views.

The chair seat 1 is mounted in the usual manner upon the enlarged upperend 2 of the hollow piston 3, which reciprocates in the hollow cylinder4;, rigidly mounted on a suitable base.

The lower end of the hollow piston 3 consists of a solid head 3 providedwith two parallel longitudinally extending wells 5, 6, in which similarpump'pistons 7, 7 reciprocate. The bottoms of the wells 5, 6 areprovided with valves 8, 9, respectively, the object of such arrangementbeing to provide a double acting pump by which oil or other fluid F canbe pumped from the hollow piston 3 into the cylinder 4 and thus elevatethe piston 3.

The pump-pistons 7, 7 are connected by piston-rods 10, 1O" with theopposite ends of a crank 11. The crank 11 is fixed upon a crank shaft12, which has bearings in the enlarged upper-end 2 of the hollow piston.The crank shaft 12 is provided with an op erating lever or handle 13.

The pump-pistons 7, 7 are of similar construction. As shown in detail inFig. 7, the pump-pistonconsists of a cup or shell having holes 14 in thebottom thereof, which are normally closed by a disk-valve 15, heldagainst the bottom of the shell by the tension of a coiled spring 16which surrounds the bolt 17 the nut 18 upon the end of said bolt holdingsaid disk 15 upon the outer end of the bolt. The sides of thepumppiston, nearthe bottom thereof, are provided with a plurality ofholes 19. Each pumppiston fits tightly in its corresponding well 5 or 6,and hence the holes 19 are thus normally closed. But the wells 5, 6, areenlarged at the bottom portions as at 20, 20, so that at the extremedownward stroke of the pump-pistons the holes 19, 19

Patented July 11, 1911. I

are open and the fluid can flow freely fro-m the bottom of the wellthrough the holes 19 into the interior of the pump-pistons 7, 7, forreasons which will hereinafter be set forth.

Each piston rod 10, 10 terminates in a wrist-link 21, which in turncarries a wrist pin pivotally connected in the pumppiston. The link 21at its bottom portion extends diametrically across the interior of thepump piston 7 or 7*, leaving a space upon each side for the flow of theoil-see Fig. t. The interior of the hollow pumppiston is dividedtransversely by a strainer 23, thereby preventing any dirt in the oilfrom passing down and clogging the lower oil passages, or interferingwith the pro-per operation of the several valves.

As before stated, the bottoms of the wells 5, 6 are provided with diskvalves 8, 9, respectively, held in their seats by flat springs 2-l, 24.The inner face of the disk 9 is provided with a spider-shaped upstandingrib 25 the ends of which form guides to hold said disk against lateraldisplacement. In the extreme lowered position of the pumppiston 7 thenut 18 rests upon said rib 25 and holds the valve 9 open, as shown inFig. 2.

The disk valve 8 is provided upon its in ner face with upstandingconcentrically arranged lugs 26 forming guides for said disk. It will beobserved that, with this construction, when the pump-piston 7 is in itslowermost position, the nut 18 upon the bottom of said pump-piston restsin the hollow between the lugs 26, and hence does not positively holdthe valve 8 in an open position.

A. vertical hole 27 is drilled in the piston head 3. Projecting fromsaid hole through the exterior wall thereof and bearing against theinner wall of the cylinder is a slidable plug or plunger 28. The innerend of said plug is beveled and bears against the oppositely beveled orwedge shaped block 29. which reciprocates in the hole 27. Said block 29is cut away on the side adja cent to the plug 28 to form a wedge shapedbearing surface. The upper end of the block 29 is pivotally connected bya pin 30 with the lower end of a pitman 31. The upper end of said pitmanis pivotally con nected to one end of the crank 11.

hen the crank 11 is operated so as to force the block 29 in itslowermost position, the wedge -shaped surface of said block presses theplunger 28 into engagement with the cylinder 4 and thus locks the piston3 against revolving in the cylinder 4:. The pin 30 extends through ashort longitudinal slot 32 in the lower end of the pitman 30, thusallowing for loose play and permitting a slight elevation of the pitmanafter the block 29 has been moved into locking position without aconsequent movement of said block 29, the reason for which willhereinafter more fully appear. The bottom of the hole 27 may be closedby a plug 33.

In order that at the time the lever handle 13 is being moved intoposition to lock the chair against revolution there may not be anystrain on the parts due to the tendency of the stroke to elevate thepiston 3, I have provided for a dread-stroke of the handle 13. Suchdead-stroke is within the are indicated by the angle a in Fig. 8. Duringthe movement of the handle 13 within the limits of the angle indicated,the holes 19 in the pun'lp-piston 7 are opposite the enlargement 20, andthe fluid beneath the piston 7 is free to flow through said openings.Thus the valve 8 under such conditions is not subjected to suflicientpressure to open the same and force more fluid beneath the piston head3. It will be seen, therefore, that the stroke. of the handle whichlocks the chair against revolution is a dead stroke so far as pumping isconcerned.

The system of levers by which the chair back 341*, arms and foot rest 36are made adjustable to different reclining positions old and well-known,and needs no description and, moreover, is clearly shown in Fig. 1. Saidparts are held in their adjusted positions by means of a rod 37 whichpasses transversely through the upper end 2 of the piston. Pivoted atone end upon the interior of the upper end 2 of the piston is abrake-shoe 38, which straddles and bears upon the rod 37 and is normallyheld in close frictional engagement therewith by means of a coiledspring 39, the tension of said spring being downward upon the free endof the brake-shoe 38. Said rod is thus normally locked against movementand in turn locks the chair in any reclining position to which it mayhave been adjusted. As a means for releasing the rod 37, I provide uponthe crank-shaft 12 a. collar 40 which carries a laterally projecting pin4-1.. The brake shoe 38 is provided at its free end with av hook or lug38 which projects in the path of movement. of said pin 4.1. Thus byrotating the crank shaft 12, through manipulation of the handle 13.sumciently for the pin to engage beneath said hook 38 and. lift thesame, the tension of the spring 39 is overcome and the rod 37 isreleased: whereupon the chair back may be adjusted to any desiredposition.

The work performed during the different operating positions of the leverhandle 1 may now be understood.

Referring to Fig. 8, the handle is reciprocated between the positionsindicated by the angle 7), one of the pump-pistons 7, 7 is be ingraised, thereby causing the pressure of the fluid above said pump-pistonto open the valve 15 and admit the fluid beneath the same. The otherpump-piston, being on its downward stroke, has its valve 15 closed andthe pressure exerted opens the corresponding valve 8 or 9, thus forcingthe fluid beneath the piston 3 and elevating the same. Meanwhile thepiston 3 is free to revolve in the cylinder 4. If it is desired toadjust the reclining position of the chair, the handle is moved throughthe are indicated by the angle 0. This being part of the dead stroke,the chairis not elevated, thereby such stroke merely releasing the brakeshoe 38 from engagement with the rod 37 to permit the adjustment of thechair, as heretofore described. If it is desired to lock the chairagainst revolution, the handle 13 is moved to the extreme left, asindicated in Fig. 5, through the arc of the angle (Z. The wedge 29 isthus forced downward to lock the parts against rotation. Upon therelease of the handle 13 the pressure of the spring 39 exerted throughthe hook 38 upon the pin 41 returns the handle to the upper limit of theangle 0, such return, owing to the lost motion due to the looseconnection at the slot 30 (see Fig. 3) not releasing the wedge or block29. Vhen it is desired to lower the chair, the handle 13 is moved to theextreme right in Fig. 8, through the arc of the angle 6. This brings thepump-piston 7 in contact with the rib 25 on the valve 9, and holds saidvalve open. The fluid is thus free to flow from the cylinder 4 aroundthe open valve 9 into the bottom of the well 6, through the openings 19in the pump-piston 7 into the hollow piston 3. The chair is thus beinggradually lowered as the fluid flows from the cylinder 4 into the hollowpiston 3.

It will be noted that I have provided a double acting pump, whereby boththe forward and return stroke of the operating handle may serve toelevate the chair, thus distributing the power required for saidoperation; that in combination with such double acting pump I am enabledto pro vide, through the operation of a single crank, means for raisingthe chair, holding it in its raised position, adjusting the recliningposition of the chair, regulating said chair so that it becomesrevoluble or nonrevoluble, and lowering the chair as may be desired.

I claim:

1. In a chair, the combination with a hollow cylinder, of a hollowpiston reciprocating therein, a chair seat mounted upon the outer end ofsaid hollow-piston, a doubleacting pump, carried within saidhollowpiston, for pumping fluid from said hollowpiston through thepiston head into the cylinder and thus elevating the chair, valvesoperated by said double acting pump for.

controlling the flow of fluid between said hollow cylinder and hollowpiston, means for providing a dead stroke during the limit of thedownward movement of one of said double acting pumping elements, andmeans for positively holding open the valve controlled by the otherpumping element at the limit of its extreme downward movement.

2. In a chair, the combination with a hollow cylinder, of a hollowpiston reciprocating therein, said piston being provided with twoparallel longitudinally extending wells, double-acting pump mechanism,carried within said hollow-pi'ston, for pumping fluid from said wellsinto said cylinder, and thus elevating said hollow piston, downwardlyopening valves at the bottom of said wells, means for providing a deadstroke during the extreme downward movement of one of the pumpingelements, and means for positively holding open the valve controlled bythe other pumping element at the limit of its extreme downward movement.

3. In a chair, the combination with a vertically mounted hollowcylinder, of a hollow piston telescopically and revolubly mountedtherein, a chair seat mounted upon the end of said piston, said chairseat being adjustable to different reclining positions, a crankshaftjournaled in said piston, an operating handle for said crank-shaft, pumpmechanism operated from said cranlgshaft for raising said piston andchair seat, said pumping, mechanism having provision, controlled by themovement of said handle in a direction beyond one of the limits of itspumping stroke, for lowering said piston and chair seat, means forproducing a dead stroke of said pump mechanism during a predeterminedmovement of said handle in the opposite direction beyond the limit ofits pumping stroke, mechanism operated from crank-shaft for locking saidpiston against a revolving movement in said cylinder during the extremeoutward movement of said handle in producing said dead stroke, andmechanism operated from said crank shaft for releasing said chair seatfrom a locked reclining position during the initial movement of saidhandle in producing said dead stroke; whereby the rotation of saidcrank-shaft to raise or lower the chair seat or to lock the same againstrevolving movement or to permit the adjusting of the reclining positionof the chair seat is dependent upon a predetermined movement of theoperating handle.

4. In a chair, the combination with avertically mounted hollow cylinder,of a hollowpiston telescopically and revolubly mounted therein, a crankjournaled in the upper end of said piston, pumping mechanism operatedfrom said crank for raising or lowering said piston and chair seat, apitman operated from said crank, means controlled by the movement ofsaid pitman for looking or unlocking said piston in respect to itsrevolving movement in said cylinder, and means for producing a deadstroke of said pumping mechanism upon the movement of said crank to locksaid piston against revolving movement.

In a chair, the combination with a vertically mounted hollow cylinder,of a hollow piston telescopically and revolubly mounted therein, saidpiston being provided at its lower end with a solid piston head having awell therein, a chair seat mounted upon the upper end of said piston, apump-piston fitting in said well, a crank for operating said pump-pistonto force fluid from said hollow piston through said well into saidcylinder and thereby to elevate said hollow piston and chair seat, areciprocating wedge block mounted in said solid head, a plungerextending laterally from said solid head against the inner wall of saidcylinder and adapted when pressed into frictional engagement therewithto lock said piston against revolving movement in said cylinder, theinner end of said plunger bearing against the wedge shaped edge of saidwtalge-block, a pitman connecting said wedge block to said crank arm,and means for providing a dead stroke of said pumppiston during theoperation of said wedge block in pressing said plunger into frictionalengagement with said cylinder.

(3. In a chair, the combination with a hollow cylinder, of a hollowpiston reciprocating therein, said piston being provided with a solidhead having two longitudinally extending wells therein, valvescontrolling the bottom openings in said wells, a pumppistonreciprocating in each of said wells, and crank mechanism for operatingsaid pump-piston to force fluid from said hollowpiston through saidvalves into said cylinder and thus to elevate the hollow-piston, areciprocating block mounted in parallel rela tion to said pump-pistons,means controlled by the position of said block to lock said hollowpiston against revolving movement in said cvlinder, and a pitmanconnecting said block with said crank mechanism.

7. In a chair, the combination with a vertically mounted hollowcylinder, of a hollow piston telescopically mounted therein, said pistonbeing provided with a solid head hav ing three parallel longitudinalopenings therethrough. outwardly opening valves at the bottom of two ofsaid openings, double acting yaunp-pistons reciprocating in said latteropenings for forcing fluid from said hollow piston into said cylinder, awedge block reci 'n'ocating in said third opening, a crank journaled insaid hollow piston, connecting members connecting said pump-pistons andsaid wedge block with said crank, means operated at the extreme downwardmovement of said wedge block for locking said hollow piston againstrevolving movement in said cylinder, means for providing a dead strokeof the downward moving pump piston during such extreme downward movementof the wedge block, and means for positively holding open the valvecontrolled by the other pump-piston at the limit of the opposite extrememovement of the crank.

8. In a chair, the combination with a ver tically mounted hollowcylinder, of a hollow piston telescopically and revolubly mountedtherein, a chair seat mounted upon the up per end of said piston, a pumppiston arranged within said hollow piston, a. crank for operating said.pump piston to force fluid from said hollow piston into said cylinder,and thereby to elevate said hollow piston and chair seat, areciprocating wedge mounted in the lower end of said hollow piston, aplunger extending laterally from said hollow piston against the innerwall of said cylinder, and adapted when pressed into frictionalengagement therewith tolock said piston against revolving movement insaid cylinder, the inner end of said plunger bearing against theinclined surface of said wedge, a pitman connecting said wedge to saidcrank arm, and means for providing a dead stroke of said pump pistonduring the operation of said wedge in pressing said plunger intofrictional engagement with said cylinder.

9. In a chair, the combination with a hollow cylinder, of a hollowpiston reciprocating therein, said piston being provided with twoparallel longitudinally extending wells, a pump piston reciprocating ineach of said wells, crank mechanism for operating said pump pistons toforce tluid from said hollow piston into said cylinder, and thus toelevate the hollow piston, a reciprocating wedge mounted in parallelrelation to said pump piston, means controlled by the position of saidwedge to lock said hollow piston against revolving movement of saidcylinder, and a pitman connecting said wedge with said crank mechanism.

10. In a chair, the combination with a vertically mounted hollowcylinder, of a hollow piston telescopically mounted therein, said pistonbeing provided with a solid head having three parallel longitudinalopenings theretln'ough, double acting pump pistons reciprocating in twoof said openings for forcing fluid from said hollow piston into saidcylinder, a wedge reciprocating in said third opening, a crank journaledin said hollow piston, connecting members connecting said pump pistonsand said wedge with said crank, and means operated by said wedge at theextreme downward movement thereof for locking said hollow piston againstrevolving movement against said cylinder.

11. In a chair, the combination with an upright, hollow cylinder, of ahollow piston reciprocating therein a crank journaled in the upper endof said piston, a handle for operating said crank, said piston being provided at its lower end with a solid head having two longitudinallyextending wells therein, the bores of said wells being enlarged at theirlower ends, outwardly opening valves closing the bottoms of said wells,pump-pistons reciprocating in said wells, the sides of the pump-pistonsnear the bottoms thereof being provided with holes normally closed bythe walls of said wells but open when said pump-pistons are in theirlowermost positions, cooperating means provided on one only of saidvalves and the corresponding pump-piston for positively holding saidvalve in its open position at the extreme downward position of thecorresponding pump-piston, whereby at one of the extreme positions ofsaid operating handle the chair is lowered and at the other extremeposition thereof a dead stroke is provided, and mechanism operated bythe movement of the crank during such dead stroke of the handle forlocking said hollow piston against rotation in said hollow cylinder.

12. In a chair, the combination with a vertically mounted hollowcylinder, of a hollow piston telescopically and revolubly mountedtherein, said piston being provided at its lower end with a solid pistonhead having a well therein, a pump-piston fitting in said well, crankmechanism for operating said pump-piston to force fluid from said hollowpiston through said well into said cylinder, a

reciprocating block mounted in said solid head, means controlled by theposition of said block to lock said hollow piston against revolvingmovement in said cylinder, and a pitman pivoted at its upper end to saidcrank mechanism and connected at its lower end to said block by pin andslot connection to provide for loose play between said pitman and blockand thereby to permit a slight elevation of the pitman after the blockhas been moved into locking position without a consequent movement ofsaid block.

In witness whereof, I hereunto subscribe my name this 23d day of May A.D., 1908.

ANDREW L. UNDELAND.

WVitnesses:

FRANK'L. WEAVER, J. Q. BURGNER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of E'atents. Washington, D. G.

